To make each petal you'll need coloured sugar and mini marshmallows, you know the kind they pile on top of your hot chocolate in cafes. I coloured my own sugar by mixing it with colour paste. Use colour paste rather than liquid as it would make it too wet. I mix it in a sieve and it gets any lumps out. Keep any left over in a jar ready for next time, and there will be a next time. Already I can't wait to do them again.

Now for the clever bit. Use scissors to snip each marshmallow in half diagonally. This gives you a sticky edge on the cut, dip this edge into the sugar and voila, you have a petal. You will see that it already has a flat edge, use this side to stick it onto the cake. Start with the outside edge and complete 3 rings. Finish with one in the centre. You will need about 16 marshmallows for each cake.